I think it’s a longer version of the same clip, no splicing.
I don’t hear anything in between, and logically, it doesn’t make much sense.
That audio has been analyzed for a couple years, and law enforcement hasn’t mentioned any screams.
They’d certainly warn the public if the audio contained anything that horrific.
People would be disturbed by that.
As for the extra word, I’m not sure.
The more we hear from this guy, the more likely it is that someone will recognize his voice.
“Guys” seems fairly innocuous, so I don’t get why they didn’t include it in the original audio.